Home/Lexus/RX/Lexus RX II (2003-2006)/Repair manual/Accessories Control Systems/Power Window Control System - Diagnosis: Other
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Power Window Control System - Diagnosis: Other Lexus RX II

Accessories Control Systems 7 illustrations ~2245 words

PRECAUTION

Note. When disconnecting the negative (-) battery terminal, initialize the following systems after the terminal is reconnected.

System NameRefer To
Lighting System (Adaptive Front-Lighting System)PRE-CHECK
Power Window Control SystemPRE-CHECK
Power Back Door SystemPRE-CHECK
Sliding Roof SystemPRE-CHECK

SYSTEM DESCRIPTIONS

CUSTOMIZE PARAMETERS

HINT

The following items can be customized.

Note. After confirming whether the items requested by the customer are applicable or not for customization, perform customize operations. Be sure to record the current settings before customizing. When troubleshooting, make sure that the item in question is not set to "OFF" as a result of customization. (Example: For the symptom "the wireless function does not operate", first check that the wireless function is not set to "OFF", then perform troubleshooting).

DISPLAY (ITEM)DEFAULTCONTENTSSETTING
UP/DOOR KEY (Door key linked P/W UP)ONFunction that enables all power windows to move up manually, via manual operation, when driver side door key cylinder is held in lock position for 1.5 seconds when ignition switch is OFF.ON / OFF
DOWN/DOOR KEY (Door key linked P/W DOWN)ONFunction that enables all power windows to move down manually, via manual operation, when driver side door key cylinder is held in unlock position for 1.5 seconds when ignition switch is OFF.ON / OFF
DOWN/WIRELESS (P/W DOWN w/ transmitter)ONFunction that enables all power windows to move down manually, via manual operation, when unlock switch on transmitter is held for 1.5 seconds when ignition switch is OFF.ON / OFF
UP/WIRELESS (P/W UP w/transmitter)OFFFunction that enables all power windows to move up manually, via manual operation, when lock switch on transmitter is held for 1.5 seconds when ignition switch is OFF.ON / OFF

CUSTOMIZE PARAMETERS (POWER WINDOW)

Scheme 66

Scheme 66: LOCATION

Scheme 67

Scheme 67

Scheme 68

Scheme 68: TERMINALS OF ECU

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Scheme 72
  1. CHECK POWER WINDOW REGULATOR MASTER SWITCH (DRIVER DOOR ECU) Disconnect the P22 switch connector. Check the voltage and resistance of each terminal of the wire harness side connector. Standard: POWER WINDOW REGULATOR MASTER SWITCH ECU TERMINALS VOLTAGE AND RESISTANCE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (P22-2) - Body ground W-B - Body ground Ground Constant Below 1 ohm BDR (P22-10) - GND (P22-2) G - W-B +B (BDR) power supply Constant 10 to 14 V CPUB (P22-9) - GND (P22-2) L-B - W-B +B (CPUB) power supply Constant 10 to 14 V SIG (P22-20) - GND (P22-2) BR - W-B Ignition power supply Ignition switch OFF --> ON 0 V --> 10 to 14 V UP (P22-1) - DN (P22-11) GR - B Power window motor UP output Power window motor DOWN output Constant Below 1 ohm If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the P22 switch connector and reset the power window motor (Refer to the pre-check, step 16) (See «PRE-CHECK»(ref-215942-S26575838012006011900000) ). Check the voltage of each terminal of the connector. Standard: POWER WINDOW REGULATOR MASTER SWITCH ECU TERMINALS VOLTAGE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition UP (P22-1) - GND (P22-2) GR - W-B Power window motor UP output Ignition switch ON, Driver side power window switch OFF --> UP (Manual operation) 0 V --> 10 to 14 V UP (P22-1) - GND (P22-2) GR - W-B Power window motor UP output Ignition switch ON, Driver side power window fully open --> Driver side power window switch UP (AUTO operation) --> Driver side power window fully closed 0 V --> 10 to 14 V --> 0 V DN (P22-11) - GND (P22-2) B - W-B Power window motor DOWN output Ignition switch ON, Driver side power window switch OFF --> DOWN (Manual operation) 0 V --> 10 to 14 V DN (P22-11) - GND (P22-2) B - W-B Power window motor DOWN output Ignition switch ON, Driver side power window fully closed --> Driver side power window switch DOWN (AUTO operation) --> Driver side power window fully open 0 V --> 10 to 14 V --> 0 V PWS (P22-6) - GND (P22-2) O - W-B Power window lock switch output Ignition switch ON, Power window lock switch NORMAL --> LOCK 10 to 14 V --> 0 V VCC (P22-19) - SGND (P22-12) LG - R Power window motor power source Power window motor sensor ground Constant 10 to 14 V If the result is not as specified, the master switch (door ECU) may have a malfunction.
  2. CHECK POWER WINDOW REGULATOR SWITCH (PASSENGER DOOR ECU) Disconnect the P19 switch connector. Check the voltage and resistance of each terminal of the wire harness side connector. Standard: POWER WINDOW REGULATOR SWITCH ECU TERMINALS VOLTAGE AND RESISTANCE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (P19-7) - Body ground W-B - Body ground Ground Constant Below 1 ohm BDR (P19-12) - GND (P19-7) G - W-B +B (BDR) power supply Constant 10 to 14 V UP (P19-6) - DN (P19-1) GR - B Power window motor UP output Power window motor DOWN output Constant Below 1 ohm If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the P19 switch connector and reset the power window motor (Refer to the pre-check, step 16) (See «PRE-CHECK»(ref-215942-S26575838012006011900000) ). Check the voltage of each terminal of the connector. Standard: POWER WINDOW REGULATOR SWITCH ECU TERMINALS VOLTAGE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition UP (P19-6) - GND (P19-7) GR - W-B Power window motor UP output Ignition switch ON, Regulator switch OFF --> UP (Manual operation) 0 V --> 10 to 14 V UP (P19-6) - GND (P19-7) GR - W-B Power window motor UP output Ignition switch ON, Passenger side power window fully open --> Regulator switch UP (AUTO operation) --> Passenger side power window fully closed 0 V --> 10 to 14 V --> 0 V DN (P19-1) - GND (P19-7) B - W-B Power window motor DOWN output Ignition switch ON, Regulator switch OFF --> DOWN (Manual operation) 0 V --> 10 to 14 V DN (P19-1) - GND (P19-7) B - W-B Power window motor DOWN output Ignition switch ON, Passenger side power window fully closed --> Regulator switch DOWN (AUTO operation) --> Passenger side power window fully open 0 V --> 10 to 14 V --> 0 V PCT (P19-11) - GND (P19-7) O - W-B Power window lock switch output Ignition switch ON, Power window lock switch of master switch NORMAL --> LOCK 10 to 14 V --> 0 V VCC (P19-5) - SGND (P19-8) LG - R Power window motor power source Power window motor sensor ground Constant 10 to 14 V If the result is not as specified, the regulator switch (door ECU) may have a malfunction.
  3. CHECK POWER WINDOW REGULATOR SWITCH (REAR LH DOOR ECU) Disconnect the P20 switch connector. Check the voltage and resistance of each terminal of the wire harness side connector. Standard: POWER WINDOW REGULATOR SWITCH ECU TERMINALS VOLTAGE AND RESISTANCE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (P20-7) - Body ground W-B -Body ground Ground Constant Below 1 ohm BDR (P20-12) - GND (P20-7) LG - W-B +B (BDR) power supply Constant 10 to 14 V UP (P20-6) - DN (P20-1) V - W Power window motor UP output Power window motor DOWN output Constant Below 1 ohm (1) SEL2 (P20-10) - GND (P20-7) W-B - W-B Terminal for identification of rear LH switch Constant Below 1 ohm (1) Terminal SEL2 is used to distinguish between the front passenger side regulator switch, rear LH regulator switch and rear RH regulator switch. To distinguish between them, terminals SEL1 and SEL2 for the front passenger side regulator switch are not grounded; the positions of terminals SEL1 and SEL2 are different between the rear regulator switches LH and RH. If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the P20 switch connector and reset the power window motor (Refer to the pre-check, step 16) (See «PRE-CHECK»(ref-215942-S26575838012006011900000) ). Check the voltage of each terminal of the connector. Standard: POWER WINDOW REGULATOR SWITCH ECU TERMINALS VOLTAGE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition UP (P20-6) - GND (P20-7) V - W-B Power window motor UP output Ignition switch ON, Regulator switch OFF --> UP (Manual operation) 0 V --> 10 to 14 V UP (P20-6) - GND (P20-7) V - W-B Power window motor UP output Ignition switch ON, Rear LH power window fully open --> Regulator switch UP (AUTO operation) --> Rear LH power window fully closed 0 V --> 10 to 14 V --> 0 V DN (P20-1) - GND (P20-7) W - W-B Power window motor DOWN output Ignition switch ON, Regulator switch OFF --> DOWN (Manual operation) 0 V --> 10 to 14 V DN (P20-1) - GND (P20-7) W - W-B Power window motor DOWN output Ignition switch ON, Rear LH power window fully closed --> Regulator switch DOWN (AUTO operation) --> Rear LH power window fully open 0 V --> 10 to 14 V --> 0 V PCT1 (P20-11) - GND (P20-7) GR - W-B Power window lock switch output Ignition switch ON, Power window lock switch of master switch NORMAL --> LOCK 10 to 14 V --> 0 V VCC (P20-5) - SGND (P20-8) L - BR Power window motor power source Power window motor sensor ground Constant 10 to 14 V If the result is not as specified, the regulator switch (door ECU) may have a malfunction.
  4. CHECK POWER WINDOW REGULATOR SWITCH (REAR RH DOOR ECU) Disconnect the P21 switch connector. Check the voltage and resistance of each terminal of the wire harness side connector. Standard: POWER WINDOW REGULATOR SWITCH ECU TERMINALS VOLTAGE AND RESISTANCE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition GND (P21-7) - Body ground W-B -Body ground Ground Constant Below 1 ohm BDR (P21-12) - GND (P21-7) LG - W-B +B (BDR) power supply Constant 10 to 14 V UP (P21-6) - DN (P21-1) V - W Power window motor UP output Power window motor DOWN output Constant Below 1 ohm (1) SEL1 (P21-9) - GND (P21-7) W-B - W-B Terminal for identification of rear RH switch Constant Below 1 ohm (1) Terminal SEL1 is used to distinguish between the front passenger side regulator switch, rear LH regulator switch and rear RH regulator switch. To distinguish between them, terminals SEL1 and SEL2 for the front passenger side regulator switch are not grounded; the positions of terminals SEL1 and SEL2 are different between the rear regulator switches LH and RH. If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the P21 switch connector and reset the power window motor (Refer to the pre-check, step 16) (See «PRE-CHECK»(ref-215942-S26575838012006011900000) ). Check the voltage of each terminal of the connector. Standard: POWER WINDOW REGULATOR SWITCH ECU TERMINALS VOLTAGE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition UP (P21-6) - GND (P21-7) V - W-B Power window motor UP output Ignition switch ON, Regulator switch OFF --> UP (Manual operation) 0 V --> 10 to 14 V UP (P21-6) - GND (P21-7) V - W-B Power window motor UP output Ignition switch ON, Rear RH power window fully open --> Regulator switch UP (AUTO operation) --> Rear RH power window fully closed 0 V --> 10 to 14 V --> 0 V DN (P21-1) - GND (P21-7) W - W-B Power window motor DOWN output Ignition switch ON, Regulator switch OFF --> DOWN (Manual operation) 0 V --> 10 to 14 V DN (P21-1) - GND (P21-7) W - W-B Power window motor DOWN output Ignition switch ON, Rear RH power window fully closed --> Regulator switch DOWN (AUTO operation) --> Rear RH power window fully open 0 V --> 10 to 14 V --> 0 V PCT1 (P21-11) - GND (P21-7) GR - W-B Power window lock switch output Ignition switch ON, Power window lock switch of master switch NORMAL --> LOCK 10 to 14 V --> 0 V VCC (P21-5) - SGND (P21-8) L - BR Power window motor power source Power window motor sensor ground Constant 10 to 14 V If the result is not as specified, the regulator switch (door ECU) may have a malfunction.
  5. CHECK INSTRUMENT PANEL J/B ASSY (MULTIPLEX NETWORK BODY ECU) Disconnect the B4, B5 and B6 ECU connectors. Disconnect the 1 A, 1D, 1F and 1M J/B connectors. Check the voltage and resistance between each terminal of the wire harness side connectors and body ground. Standard: INSTRUMENT PANEL J/B ASSY AND ECU TERMINALS VOLTAGE AND RESISTANCE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition BECU (1D-10) - Body ground L-B - Body ground +B (BECU) power supply Constant 10 to 14 V ALTB (1D-16) - Body ground W - Body ground +B (power system, generator system) power supply Constant 10 to 14 V BATB (1A-1) - Body ground W (1) - Body ground +B (power system, generator system) power supply Constant 10 to 14 V B (2) - Body ground KSW (B4-21) - Body ground B - Body ground Key unlock warning switch input No key in ignition key cylinder --> Key inserted 10 kohm or higher --> Below 1 ohm DCTY (B6-14) - Body ground L - Body ground Driver side courtesy switch input Driver side door CLOSED --> OPEN 10 kohm or higher --> Below 1 ohm PCTY (B5-23) - Body ground L - Body ground Passenger side courtesy switch input Passenger side door CLOSED --> OPEN 10 kohm or higher --> Below 1 ohm GND1 (1F-10) - Body ground W-B - Body ground Ground Constant Below 1 ohm GND2 (1M-9) - Body ground W-B -Body ground Ground Constant Below 1 ohm (1) w/ Air suspension system (2) w/o Air suspension system If the result is not as specified, there may be a malfunction on the wire harness side. Reconnect the B4, B5 and B6 ECU connectors. Reconnect the 1 A, 1D, 1F and 1M J/B connectors. Check the voltage between each terminal of the connector and the body ground. Standard: INSTRUMENT PANEL J/B ASSY AND ECU TERMINALS VOLTAGE Symbols (Terminal No.) Wiring Color Terminal Description Condition Specified Condition KSW (B4-21) - Body ground B - Body ground Key unlock warning switch input No key in ignition key cylinder --> Key inserted 10 to 14 V --> 0 V If the result is not as specified, the J/B assy (body ECU) may have a malfunction.